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Couple of days ago a program named similar to windows 10 update assistant, was downloaded auto to my windows 10 system. Stating,

support for the version of windows 10 I am using will be running out soon and I have to update my system to the latest version of windows 10

I was previously using,

Windows 10 pro Edition, (probably Version 1607 - Anniversary Update)

It took the program more than a day to upgrade to the latest version. Ever since I upgraded I am unable to:

  • access task manager
  • access regedit
  • access gpedit.msc
  • access services
  • Access restore point setting
  • Access quick Assist
  • Access remote assistant
  • Access advanced system settings (I wanted to check environment variables)
  • Open Command Prompt as administrator
  • Access any major feature

While accessing all of the above features an error message similar to the following one appears, with the path of the .exe or .msc being accessed.

Windows cannot find 'C:\Windows\system32\taskmgr.exe', make sure you typed the name correctly and then try again

I explored the directory using windows explorer and tried opening the file directly but again the same error appears on the screen.

[error message]1

I tried to,

  • Revert back to the previous version via

settings app > update & security > recovery > go back to the previous version of windows 10,

but clicking the get started button does nothing.

  • Reset windows via

settings app > update & security > recovery > reset this pc,

again clicking the get started button does nothing.

I believe its a small subset of features I am unable to access, since I haven't tried accessing everything.

I haven't hated windows 10 this much in all of this time, its been so annoying.

  • First some subset of my custom settings for mouse etc. were reverted back to the defaults,
  • all the programs pinned to my start menu(which were like a lot) were reverted back to the windows default.
  • Now some of the pinned program icons are not appearing

How the hell I can get out of this nightmare,

  • 1
    Probably better to just download the current version and install afresh. – user772515 Feb 6 '18 at 18:23
  • Press Ctrl+Shift+Esc from keyboard. Or run this command in command prompt: where taskmgr.exe. What did you see? – Biswapriyo Feb 6 '18 at 18:25
  • @Biswapriyo C:\Windows\System32\Taskmgr.exe, as I mentioned I explored the file and opening it manually still shows the same error. – Saif Ullah Feb 6 '18 at 18:30
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  • Press Control + Alt + Delete
  • Click Sign out
  • At the Sign In screen, hold down the shift key while clicking the Power button on the screen
  • Continue to hold down the shift key while clicking Restart from the pop up list
  • Continue to hold down the shift key until Advanced Recovery Options menu appears
  • Click Troubleshoot
  • Click Advanced options
  • Click Go back to the previous version of Windows

It would take 20-25 minutes to revert back to your previous version of windows.

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